I. SPECTRUM analysis is now becoming so far-reaching, especially in inquiries having to do with the conditions of the various celestial bodies, that there are many who are anxious to know something of ...

Learn about color and how to create a spectroscope using simple materials. What is color? Learn about light and wavelengths and what creates color in this episode of Camp GPB. Then learn how to build ...

II. Series. MESSRS. RUNGE AND PASCHEN 2 first showed in 1890 that the spectra of lithium, sodium, and potassium were the summation of the spectra of various “series.” Later they have shown that lead ...